EP2060749A2 - Ensemble traverse pour un moteur à turbine et ensemble moteur à turbine correspondant - Google Patents
Ensemble traverse pour un moteur à turbine et ensemble moteur à turbine correspondant Download PDFInfo
- Publication number
- EP2060749A2 EP2060749A2 EP08253709A EP08253709A EP2060749A2 EP 2060749 A2 EP2060749 A2 EP 2060749A2 EP 08253709 A EP08253709 A EP 08253709A EP 08253709 A EP08253709 A EP 08253709A EP 2060749 A2 EP2060749 A2 EP 2060749A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- turbine engine
- frame
- strut
- coefficient
- thermal expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/246—Fastening of diaphragms or stator-rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
- F01D25/26—Double casings; Measures against temperature strain in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/94—Functionality given by mechanical stress related aspects such as low cycle fatigue [LCF] of high cycle fatigue [HCF]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/94—Functionality given by mechanical stress related aspects such as low cycle fatigue [LCF] of high cycle fatigue [HCF]
- F05D2260/941—Functionality given by mechanical stress related aspects such as low cycle fatigue [LCF] of high cycle fatigue [HCF] particularly aimed at mechanical or thermal stress reduction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
- F05D2270/3032—Temperature excessive temperatures, e.g. caused by overheating
Definitions
- This invention relates to a frame for a turbine engine such as a mid-turbine frame.
- a mid-turbine frame for a turbine engine couples a spool to a high spool of a turbine engine.
- the mid-turbine frame is located between the high pressure turbine and the low pressure turbine. Consequently, there is a large thermal gradient between the high pressure turbine and the low pressure turbine that contributes to the load on the frame in addition to the mechanical loads of the turbine engine in normal operation. Because of the large thermal gradient at this location, there is a greater propensity for the mid-turbine frame to distort and become oval in shape. This ovalization of the frame can interfere with the normal operation of the low spool and the high spool of the turbine engine, placing excess loads on the bearings that support the spools on the frame.
- the invention comprises a turbine engine assembly having a frame and a turbine engine spool.
- a strut couples the frame to the turbine engine spool.
- an actuator couples the strut to the frame.
- the actuator has a spring.
- FIGS 1 and 2 illustrate alternative perspective views of an embodiment of the inventive turbine engine assembly 10.
- Turbine engine assembly 10 has frame 14 having a generally cylindrical shape 34. First opening 38 is provided on one side of frame 14 while second opening 42 is provided on the other. First opening 38 is spaced from second opening 42 along an axis, axis A, of generally cylindrical shape 34. Disposed within frame 14 is first turbine engine spool 18 and second turbine engine spool 108. As shown in Figure 2 , first turbine engine spool 18 is nested within second turbine engine spool 108.
- First turbine engine spool 18, a low spool, is linked to a turbine fan, a low pressure compressor, and a low pressure turbine while second turbine engine spool 108, a high spool, is linked to a high pressure compressor, and a high pressure turbine as known.
- First spool 18 and second turbine engine spool 108 rotate about axis A on low spool bearing 128 and high spool bearing 132.
- First turbine engine spool 18 and second spool 108 are supported to rotate about axis A by first struts 26, vanes 136 and second struts 96.
- torque box 140 links movement of first strut 26 with second strut 96 so that loads on frame 14 as well as from turbine engine spools 18 and 108 may be balanced.
- first actuator 30 is shown coupling first strut 26 to frame 14.
- First actuator 30 comprises first spring 50 disposed about both sides of cam 84.
- First spring 50 is made of two leafs, first leaf 88 and second leaf 92.
- First leaf 88 is made of first material 60 having first coefficient of thermal expansion 64 while second leaf 92 is made of second material 68 having second coefficient of thermal expansion 72.
- First material 60 may be steel, which has a positive coefficient of thermal expansion
- second material 68 may be ceramic, which may have a negative coefficient of thermal expansion.
- the coefficient of thermal expansion of steel is much greater than the coefficient of thermal expansion of ceramic. For reasons that will be explained later, this difference contributes to the operation of actuator 30.
- first leaf 88 is attached to frame 14 at first portion 76 by screw 78. At the other end, second portion 80 of first leaf 88 is secured to cam 84.
- Cam 84 is affixed to cup 144 by pin 148. Cam 84 may rotate in the direction of arrow B or arrow C, although this movement and rotation will be slight in actual operation. Cam 84 rests on rod 152, which itself is coupled to spring 156, having one end attached to rod 152 and the other end attached to first strut 26. Cam 84 may rotate on contact surface 160 of rod 152 and may also move in the direction of arrow D or E relative to first strut 26 as shown.
- Cup 144 will likewise move with cam 84 along the directions of arrow D or E because of its link to cam 84 through pin 148.
- first strut 26 is linked to torque box 140 by a mechanical connection, such as a ball joint.
- First strut 26 and second strut 96 are made in the same way, the only difference being, as shown in Figure 3 , the length of the actual strut.
- the second strut 96 is coupled to the frame 14 through a similar actuator to the actuator 30.
- first struts 26 extend radially about spool 18.
- each first strut 26 is separated from its neighboring first strut 26 so that first portion 76 is secured independently to frame 14 from a neighboring spring of a neighboring actuator.
- first strut 26 may move somewhat independently of its neighboring strut.
- third strut 116 is coupled to third actuator 120 having third spring 124.
- Third strut 116 is spaced from first strut 26 such that third spring 124 is not affixed to first spring 50. Accordingly, first strut 26 may move independently of third strut 116.
- first strut 26 and actuator 30 Distortions of frame 14 are transmitted to first spring 50 by screw 78 as frame 14 expands radially outward, say in the direction of arrow R, such as due to thermal expansion of frame 14.
- Frame 14 will pull screw 78 as well as first portion 76 of first spring 50 in the same direction, creating tension in first leaf 88, which is fixed at the other end to cam 84.
- Second leaf 92 is fixed, such as by bonding to first leaf 88, and is made of second material 68 having second coefficient of thermal expansion 72, which is less than the first coefficient of thermal expansion of first material 60.
- first leaf 88 may be further reduced by rotation of cam 84 in the direction of arrow B.
- first leaf 88 may resiliently contract in the direction of arrow H causing cam 84 to rotate back in the direction of arrow C. In this way, forces caused by mechanical loading as well as thermal expansion can be alleviated by actuator 30.
- coil spring 156 is provided to absorb this force by compressing so that movement of cam 84 in the same direction of arrow E is eliminated or reduced.
- cam 84 is relatively unaffected.
- the inventive strut design permits load balance and equilibrium of forces from bearings, here low spool bearing 128 and high spool bearing 132, as well as forces from thermal expansion of frame 14.
- thermal forces are offset by first spring 50 while mechanical loads from bearings are offset by coil spring 156.
- frame 14 achieves radial and circumferential stability, which leads to longer part life of bearings 128, 132 and frame 14.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Supercharger (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/938,988 US8001791B2 (en) | 2007-11-13 | 2007-11-13 | Turbine engine frame having an actuated equilibrating case |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2060749A2 true EP2060749A2 (fr) | 2009-05-20 |
EP2060749A3 EP2060749A3 (fr) | 2012-03-07 |
EP2060749B1 EP2060749B1 (fr) | 2013-09-11 |
Family
ID=40260750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08253709.3A Expired - Fee Related EP2060749B1 (fr) | 2007-11-13 | 2008-11-13 | Ensemble traverse pour un moteur à turbine et ensemble moteur à turbine correspondant |
Country Status (2)
Country | Link |
---|---|
US (1) | US8001791B2 (fr) |
EP (1) | EP2060749B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2148046A3 (fr) * | 2008-07-23 | 2013-06-26 | United Technologies Corporation | Cadre de turbine à géométrie variable actionnable |
EP2400119A3 (fr) * | 2010-06-23 | 2017-04-26 | Honeywell International Inc. | Système et méthode de jeu des extrémités d'aubes de rotor et de dynamique d'arbre dans un moteur à turbine à gaz |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8568083B2 (en) * | 2009-09-04 | 2013-10-29 | United Technologies Corporation | Spool support structure for a multi-spool gas turbine engine |
JP5781334B2 (ja) * | 2011-03-04 | 2015-09-24 | アルバック機工株式会社 | 油回転真空ポンプ |
US11635025B2 (en) | 2012-10-01 | 2023-04-25 | Raytheon Technologies Corporation | Gas turbine engine with forward moment arm |
US10247035B2 (en) | 2015-07-24 | 2019-04-02 | Pratt & Whitney Canada Corp. | Spoke locking architecture |
CN107849937B (zh) | 2015-07-24 | 2020-06-19 | 普拉特-惠特尼加拿大公司 | 涡轮中间框架辐条冷却系统及方法 |
US10443449B2 (en) | 2015-07-24 | 2019-10-15 | Pratt & Whitney Canada Corp. | Spoke mounting arrangement |
US10605119B2 (en) * | 2017-09-25 | 2020-03-31 | United Technologies Corporation | Turbine frame assembly for gas turbine engines |
US11939070B2 (en) | 2020-02-21 | 2024-03-26 | General Electric Company | Engine-mounting links that have an adjustable inclination angle |
US11970279B2 (en) | 2020-02-21 | 2024-04-30 | General Electric Company | Control system and methods of controlling an engine-mounting link system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB663021A (en) * | 1949-01-05 | 1951-12-12 | Westinghouse Electric Int Co | Improvements in or relating to bearing support assemblies for rotary machines |
US2936999A (en) * | 1956-12-07 | 1960-05-17 | United Aircraft Corp | Tangential bearing supports |
GB2112084A (en) * | 1981-10-30 | 1983-07-13 | Rolls Royce | Bearing support structure |
US4979872A (en) * | 1989-06-22 | 1990-12-25 | United Technologies Corporation | Bearing compartment support |
GB2242711A (en) * | 1990-04-02 | 1991-10-09 | Gen Electric | Gas turbine engine frame |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4201046A (en) | 1977-12-27 | 1980-05-06 | United Technologies Corporation | Burner nozzle assembly for gas turbine engine |
US4422300A (en) | 1981-12-14 | 1983-12-27 | United Technologies Corporation | Prestressed combustor liner for gas turbine engine |
US5275357A (en) | 1992-01-16 | 1994-01-04 | General Electric Company | Aircraft engine mount |
US5319922A (en) | 1992-12-04 | 1994-06-14 | General Electric Company | Aircraft gas turbine engine backbone deflection control |
US5439348A (en) * | 1994-03-30 | 1995-08-08 | United Technologies Corporation | Turbine shroud segment including a coating layer having varying thickness |
US5575607A (en) | 1994-11-02 | 1996-11-19 | United Technologies Corporation | Jet engine transport vehicle lift system and a build cell |
GB9606546D0 (en) * | 1996-03-28 | 1996-06-05 | Rolls Royce Plc | Gas turbine engine system |
US6082959A (en) | 1998-12-22 | 2000-07-04 | United Technologies Corporation | Method and apparatus for supporting a rotatable shaft within a gas turbine engine |
US6491497B1 (en) | 2000-09-22 | 2002-12-10 | General Electric Company | Method and apparatus for supporting rotor assemblies during unbalances |
US7578132B2 (en) * | 2001-03-03 | 2009-08-25 | Rolls-Royce Plc | Gas turbine engine exhaust nozzle |
US6783319B2 (en) | 2001-09-07 | 2004-08-31 | General Electric Co. | Method and apparatus for supporting rotor assemblies during unbalances |
US6708482B2 (en) | 2001-11-29 | 2004-03-23 | General Electric Company | Aircraft engine with inter-turbine engine frame |
US6910863B2 (en) | 2002-12-11 | 2005-06-28 | General Electric Company | Methods and apparatus for assembling a bearing assembly |
US6926495B2 (en) * | 2003-09-12 | 2005-08-09 | Siemens Westinghouse Power Corporation | Turbine blade tip clearance control device |
GB0326544D0 (en) * | 2003-11-14 | 2003-12-17 | Rolls Royce Plc | Variable stator vane arrangement for a compressor |
US7195447B2 (en) | 2004-10-29 | 2007-03-27 | General Electric Company | Gas turbine engine and method of assembling same |
US7246995B2 (en) * | 2004-12-10 | 2007-07-24 | Siemens Power Generation, Inc. | Seal usable between a transition and a turbine vane assembly in a turbine engine |
US7448846B2 (en) * | 2005-08-06 | 2008-11-11 | General Electric Company | Thermally compliant turbine shroud mounting |
US7632064B2 (en) * | 2006-09-01 | 2009-12-15 | United Technologies Corporation | Variable geometry guide vane for a gas turbine engine |
-
2007
- 2007-11-13 US US11/938,988 patent/US8001791B2/en not_active Expired - Fee Related
-
2008
- 2008-11-13 EP EP08253709.3A patent/EP2060749B1/fr not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB663021A (en) * | 1949-01-05 | 1951-12-12 | Westinghouse Electric Int Co | Improvements in or relating to bearing support assemblies for rotary machines |
US2936999A (en) * | 1956-12-07 | 1960-05-17 | United Aircraft Corp | Tangential bearing supports |
GB2112084A (en) * | 1981-10-30 | 1983-07-13 | Rolls Royce | Bearing support structure |
US4979872A (en) * | 1989-06-22 | 1990-12-25 | United Technologies Corporation | Bearing compartment support |
GB2242711A (en) * | 1990-04-02 | 1991-10-09 | Gen Electric | Gas turbine engine frame |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2148046A3 (fr) * | 2008-07-23 | 2013-06-26 | United Technologies Corporation | Cadre de turbine à géométrie variable actionnable |
EP2400119A3 (fr) * | 2010-06-23 | 2017-04-26 | Honeywell International Inc. | Système et méthode de jeu des extrémités d'aubes de rotor et de dynamique d'arbre dans un moteur à turbine à gaz |
Also Published As
Publication number | Publication date |
---|---|
US20090120102A1 (en) | 2009-05-14 |
EP2060749A3 (fr) | 2012-03-07 |
US8001791B2 (en) | 2011-08-23 |
EP2060749B1 (fr) | 2013-09-11 |
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